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EN 462-1 Wire Type were introduced as a EUROPEAN STANDARD to supersede the German Standards
(DIN 54.109) and the British Standards Institute (BS3971:1980 type 1) Image Quality Indicators. Each
indicator consists of a series of seven parallel wires of different thichkness mounted and encapsulated
between two thin sheets of transparent, flexible PVC. A lead monogram indicates the number of the thickest wire, the material and the EN symbol.
Wire Diameters:
| Wire Number | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| Wire Diam(mm) | 3.20 | 2.50 | 2.00 | 1.60 | 1.25 | 1.00 | 0.80 | 0.63 | 0.50 | 0.40 |
| Wire Number | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | |
| Wire Diam(mm) | 0.32 | 0.25 | 0.20 | 0.160 | 0.125 | 0.100 | 0.080 | 0.063 | 0.050 |
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